Results of covariance analyses on the decrease of water phosphorus concentrations based on the trophic state.

For each trophic state, n = 39. The first letter of the acronym corresponds to the water (A for Alsatian and V for Vosgian water), the second letter corresponds to the subpopulation (A for Alsatian and V for Vosgian subpopulation) e.g. AV: Vosgian E. nuttallii in Alsatian water. The results of the multiple comparisons among slopes are given by an exponent letter: values that do not differ at the 0.05 level are noted with a same letter (a < b < c). Results of covariance analyses on the decrease of water phosphorus concentrations based on the trophic state.